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The POLAR-300 is a high-end, MEMS-based Air Data and Attitude and Heading Reference System (ADAHRS) and Inertial Navigation System (INS). It is perfect for system integration in avionics packages or other attitude sensing applications. POLAR-300 has proved itself in a variety of highly dynamic environments, giving outstanding results.


Air Data and Attitude and Heading Reference System ADAHRS POLAR-300
Precision Attitude Estimation

Years of R&D invested in aerospace-grade estimation algorithms have resulted in outstanding precision and robustness.

Compact and Easy to Integrate

Reduced size and weight allows straight forward integration into the user's system.

Exceptional Performance in Highly Dynamic Conditions and Dead Reckoning Navigation

Exceptional navigation and attitude performance are combined in one device to provide robust and accurate dead reckoning navigation in GNSS-denied environments.

Meticulous Calibration Procedures

UAV Navigation's manufacturing facility is equipped with state-of-the-art calibration and setup instruments; all products are subject to the most stringent Quality Control checks.


None of the traditional gimbal-lock problems.

Lightning-fast Data Rates

Latency is minimized by using the highest data report rates from the sensors (critical for advanced control systems).

The POLAR-300 is a high-end, MEMS-based Air Data and Attitude and Heading Reference System (ADAHRS) and Inertial Navigation System (INS). It is perfect for system integration in avionics packages or other attitude sensing applications, and includes:
  • Attitude Heading & Reference System (AHRS).
  • Inertial Measurement Unit (IMU).
  • Inertial Navigation System (INS).
  • Air Data System (ADS).
  • Global Navigation Satellite System (GNSS, including: GPS, Galileo, GLONASS, BeiDou).


POLAR-300 has proved itself in a variety of highly dynamic environments, giving outstanding results:
  • Red Bull Air Race
  • MotoGP onboard 'GyroCam'
  • Reno Air Races.
  • Various UAVs as the onboard ADAHRS for the Customer's own flight control computer.

Redundancy built into the POLAR-300 software allows it to survive individual sensor failures while maintaining accurate estimates of attitude and position. Its high-performance MEMS-based IMU is calibrated and compensated over the full industrial temperature range.

Key features:
  • High accuracy attitude estimation. Precise attitude determination is an essential process for aircraft navigation and control. To achieve outstanding levels of attitude estimation precision, years of research and development of aerospace-grade sensor fusion estimation algorithms have been invested.
  • Redundant IMU.
  • Compact and easy to integrate.
  • Supplied as standard in an aircraft-grade anodized aluminium box.
  • Optionally it can be supplied as an OEM board for direct integration in the Customer's product
  • As a developer and manufacturer of professional grade autopilots, UAV Navigation is committed to the highest aviation standards in terms of product performance, accuracy and reliability. UAV Navigation's manufacturing facility is equipped with state-of-the-art calibration and measurement tools and all products which leave the facility must pass exhaustive Quality Control checks. Repeatability is key. All equipment and tools used during manufacture, calibration and Acceptance Testing Protocol (ATP) comply with UAV Navigation's strict Quality Policy
  • Combines exceptional navigation and attitude performance device in a wide range of high dynamics conditions and GPS-denied dead-reckoning navigation.
  • Quaternion-based solution. Avoiding the gimbal-lock problems found in traditional systems.
  • High data report rates from the sensors in order to reduce the latency. This is a critical requirement in advanced control systems.
  • It is used as the onboard sensor suite inside UAV Navigation's VECTOR autopilot.
  • Compatibility with DGC01 (Dual GNSS Compass + External GNSS).  It improves heading estimation also in static applications.
  • GNSS redundancy when used alongside with DGC01.
  • Internal temperature measurement redundancy.

Online Sensor Diagnostics
Sensor Failure Tolerance
All single, several multiple
Over 60462 h
Telemetry Port (P0)
RS-232. Configuration / Telemetry. 115200 bps.
Telemetry Port (P1)
RS-232 / 422 / 485 . Configuration / Telemetry (Up to 3 Mbps)
CAN (Under request)
CAN A/B. Up to 1 Mbps
Input Voltage
+9V to +36V DC
Power consumption
1W (@ 12 VDC)
Receiver Type
72 Channel, L1C/A, L1OF, B1I, E1B/C
Time to First Fix (Cold / Hot)
< 26 s / < 2 s
Altitude / Velocity Limit
50,000 m / 500 m/s
Navigation Update Rate
5 Hz
30 ns RMS, 60 ns 99%
Horizontal Position Accuracy
2.5 m (CEP, 50%, 24 h static, -130 dbm, >6 SVs)
Heading Accuracy
< 0.4º Dynamic (50% @ 30 m/s)
Dual GNSS Compass / External GNSS
External Payload Available (DGC01)
Airspeed Ranges
15-220 kt
43 – 450 kt (Under Request)
Airspeed Precision
±3% Reading
Airspeed Resolution
±1 kt
Altimeter  Range
-2.000 ft to +36.000 ft AMSL
Altimeter Accuracy
±3% Reading
Altimeter Resolution
±1 ft
Sampling Rate (IMU + Attitude)
Up to 500 Hz
± 8 g, all Axes (± 15 g Under Request)
3dB Bandwidth
200 Hz
<0.43 mg/√Hz
± 300 º/s, all Axes
3dB Bandwidth
77 Hz
0.015 °/s /√Hz
Internal Magnetometer
3 Axes (possibility to connect external magnetometer, e.g. MG01)
Altitude Compensation
Full Scale Range
+/- 1000 uT
0.10 uT
Maximum Applied Magnetic/Field
100,000 uT
Pitch & Roll Error
< 0.5º
Heading Error
< 1º
Estimated Position Accuracy
2.5 m CEP, GNSS & SBAS available
Dead Reckoning Drift
<30 m/min (continuous, not first minute only)
Size (mm, H x W x L)
  • Boxed: 22 x 40 x 82
  • OEM: 14 x 36 x 51
  • Boxed: 76g
  • OEM: 17g
Mating Connector (Boxed)
Micro-D Type, Male, 15-Pin
GNSS Antenna Connector (Boxed)
50 Ohm SMA Female
Static / Pitot Port Diameter (Boxed)
3.0 mm
Up to 90% RH, Non-Condensing
Temperature Range
-40 to +85 ºC
Shock Survival
500 g, 8 ms, ½ sine


UAV Navigation offers the POLAR-300 Kit to enable evaluation of the POLAR-300 product by Customers.

The Kit includes a POLAR-300 unit along with a POLAR-300 Break Out Board (BOB) to allows the user to access all the available POLAR-300 Inputs and Outputs.

  • POLAR-300 unit
  • POLAR-300 Breakout Board
  • GNSS antenna (Tallysman 33-2410-00-5000)
  • Connector (GLENAIR MWDM2L-15S-6E5-18)


POLAR-300 for FCC

POLAR-300 for Flight Control Computers (FCC)

POLAR-300 is a compact and lightweight device designed to provide reliable and accurate data stream from our tested and optimized attitude and heading reference system to SATCOM, camera gimbal or third-party Flight Control Computers (FCC).











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UAV Navigation is a privately-owned company that has specialized in the design of flight control solutions for Unmanned Aerial Vehicles (UAVs) since 2004. It is used by a variety of Tier 1 aerospace manufacturers in a wide range of UAV - also known as Remotely Piloted Aircraft Systems (RPAS) or 'drones'. These include high-performance tactical unmanned planes, aerial targets, mini-UAVs and helicopters.